Thread-holding means fob pile-cutting machines



Feb. 19 1924. 1,4 4,294

J, s. ,BOYD

THREAD HOLDING MEANS FOR FILE CUTTING MACHINES Original Filed April 10 1923 2 SheetsPSheet 1 nun HIIIIIIIIIIIIH M unmnnmmm? f fllll-lllllllllllflmlklgl llllllinllll juw v Q anvemtoz um, d/ qy 33n iis 9 km Feb. 19 1924.

J. S. BOYD THREAD HOLDING MEANS FOR PILE CUTTING MACHINES Original Filed April 10 192 3 2 Sheets-Sheet 2 Q I Q 0 Patented Feb. 19, 1924.

UNITED STATES PATENT OFFICE. 1

JOHN S. BOYD, OF WILLIAMSTOWN, MASSACHUSETTS, ASSIGNOR TO JOHN BOYD CO. INC., 015 WILLIAMSTOWN, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

THREAD-HOLDING MEANS FOR PILE-CUTTING MACHINES.

Application filed April 10, 1923, Serial No. 631,179. Renewed January 12, 1924.

To all whom it may concern: I

Be it known that I, JOHN S. BOYD, a

citizen of the United States, and a resident of Williamstown, county of Berkshireand 5 State of Massachusetts, have invented a certain new and useful Improvement in Thread-Holding Means for Pile-Cutting Machines, of which the following is a specification.

-This invention relates to an improvement in a machine for cutting the pile threads of a fabric which after subsequent treatments becomes an ornamental pile fabric, and specifically relates to that part of the out ting machines which acts to prevent out pile threads from clogging the cutting knives and consequently rendering the same inoperative or faulty in operation.

A further object of this invention is to provide a simple means for holding down out pile threads during the cutting operation of such threads, whereby said threads are carried away from the knives and are consequently prevented from interfering with the proper cutting operation of the same.

With these objects, and other objects which may hereinafter appear, in view, have devised the particular arrangement of parts hereinafter set forth and more particularly pointed out in the claims appendedhereto.

Reference is to be had to the accompanying drawing, forming a part thereof, in which Figure 1 is an elevation of a portion of a pile cutting machine, showing my improved thread-holding means, parts being broken away-and also shown in sect-ion to clearly disclose construction;

Figure 2 is a front elevation of a portion of the cutting shaft, showing several of the rotary cutters or knives and the manner in which the same bear on and cut the pile threads;

Figure 3 is a diagrammatic view of the upper face of a section of a novel form of pile fabric, the lines on which the same is out being'shown in light dotted lines; and

Figure 4 is a transverse sectional view of thecutting shaft and attendant parts of the cutting machine and the improved thread-holding means.

Throughout the various views of the 7 primary drawings, similar reference characters designate similar parts.

My improved thread-holding means is intended to be used when a novel form of a pile fabric is being made, the fabric in its state being diagrammatically (10 shown in Figures 2 and 3, where it will be seen that the same consists of a woven base 1, the upper face of which is provided with a plurality of looped pile-forming threads 2. These threads 2 are secured at intervals to the base fabric 1 by interengagement therewith, as is diagrammatically illustrated at 3. The location of these points of en gagement or interweave determines the pattern to be produced on the fabric, and in the fabric shown in Figure 3 the points of interengagement or binder threads 3 are staggered with relation to one another as shown. In the operation of producing the fabric, the pile-forming threads or loops 2 (5 are cut along parallel lines 4 (Figure 3) and certainportions-of said threads 2 become I loose and free to be removed from the fabric. These portions which become loose after the cutting operation are shown at 5 so in Figures 2 and 3. After the loosened threads are removed from the fabric the remaining threads 2 which are attached to the base 1 by the binder stitches 3, are worked up into areas of pile.

This invention therefore relates to a means for preventing the cut threads 5 from getting between the knives or under the same while the cutting operation is taking place, and also acts to properly direct these cut threads downward and away from the knives after the cutting operation.

At 6 is shown one of the side frame members of the cutting machine, and the opposite side frame member is shown at 7 These frame members are connected in the usual. manner by a pair of straight bars 8 and 9 which form straight edges over which the fabric 10 to be out is moved.

The fabric to be cut is moved forward 1 to the cutters 11 and over the bars 8 and 9 by means of suitable rollers (not shown) or other conventional means. I

At 12 is shown the cutting shaft which receives the knives or cutters 11. The shaft 1 12 is arranged to rotate in suitable hearings in the side frame members 6 and 7, and

said shaft may be driven by any suitable mechanism. The knives 11 are adapted to be secured on the shaft at any desired position with respect to one another to suit various requirements, and each knife-is'providedwith. an outer circumferential cutting edge 13 and=a h11bp01ti0nllprovidedwith a key 15 which prevents the knife from rotating independently of its shaft 12;

As will be seen in Figure 4:, the knives normally bear; dowlrupoirthe upper edge of the bar 9 so that when the fabric 10 is passed between the upper edge of thebar 9 and the knives 11.the pileeforming threads 2 on the upper faceof the fabric are cut through. To prevent the knives from cutting' through the base fabric 1, the pile forming threads 2, are held up. and away fromthe basefabricl bymeansof pairs of wires 16 (Figure 2) which are thrust under the" threads 2.

The knives 11 are sopositioned on. the,

Mounted on the side frame member 7, andsecured thereto as by the bolt 17 isa bracket. 18 provided with an upper horizontal portion'19' which restsupon theframe member 7, and which receives the bolt 17 The bracket 18 is also provided with a downwardly bent portion, 20 and an outwardly extending flat. supporting portion 21. EX.- tending upwardly from the upper face of the portion. 21 of the bracket is a stud: 22, which has its upper end threaded as at 23 to receive an adjusting nut 24. At 25 is a cross bar which is provided at one of its ends With a slot 26 through which the stud 22 passes. A spring 27 surrounds the stud 22,

and the end of the bar 25 rests upon said spring. It will be apparent from the foregoing that by manipulation of the-adjusting nut 24 the bar 25 may be raised and lowered for a purpose to be hereinafter set forth.

On the opposite side frame member 6 is secured, as by the bolt 28, a bracket 29; This" bracket 29' is provided with an inwardly extending supporting portion. 30 which is provided with an upwardly projecting' stud 31 having a threaded upper end. 32 which receives an adjusting nut 83. A spring 34 surrounds the stud 31 below the bar25. The bar25'isprovided with a slot 35through which the stud passes;

The bar 25-is provided with an: upwardly projecting end 36 from which extends a threaded rod 37 llliflliPaSSGS through an adby v manipulation of the'nuts 24 and 33, and

that said. bar may be-adj usted longitudinally by manipulation of the nut 38, the slots 26 and. 35 in the bar permitting such longitudinal adj ustment without interference by their respective studs 22"and 3'1. V

The bar 25 acts as a support for a plurality of spaced thread-holding resilient fingers- 4l0 in the nature ofresilient wires, which proect downwardly from thebar 25 and rest with resilient pressure on top "of the fabric 10which is supported on the bar 9. These resilient wiresaro so positioned'that one of each of said wires proj cots-between each pair of knives and presses downwardly on the threads 5 which are detached by the cutting Thus, during thewcutting opera-' operation. t1on the threads which are freed are held down, and are carrled downwardly on the fabric.- Additionally the spaced wires form a comb through whichv the loosened threads cannot movebackwardly andv'clo'g the-spaces between the knives or force their waybe tween the knives andthe bar 9 to impede the cutting action of the knives:

The wires 40 are under tension and this tension. is regulatable by the. raising: and loweringrof the bar, which is done; as heretofore explainedrby the manipulation of the adj ustingnuts 24 anda33; The wires 40imay also bepositioned relativetothe knives-by: longitudinal: movement of the bar25, and" this is done, as heretofore explained by-the manipulation. oft the nut 38'. Thelast mentioned adjustment is required: to. adapt: the? device to the various patternscapable of? be ing cut on the machine.

From t-heforegoing, it is obviousthat my invention is not to be restricted to theexaot. embodiment shown and described, but is broad: enough to cover all: structures coming: within the scope of the annexed claims.

Having described my invention, what: I claim is 1.. In a: machineof the class described, a support over which the fabric is adapted to be moved. a plurality of? spaced knives adapted to cut threads on; the, upper face of the fabric while said: fabric is moved: over the support, a. bar, a plurality of spring members having free ends extending downwardly from said bar and p11ojecting between. the knives and bearing down on threads cut by the knive, means for regulating the pressure off said spring members, and meansfor adjusting thezposi tion ofsaid members relative to the knives.

2; In: a. machine of the class described, a frame having a pair of. side members,.brack ets secured to said sidegmembers, studsi ex tending from said brackets, a barextending between said brackets and resiliently supported on said studs, a support for a fabric, a plurality of knives for cutting pile threads on said fabric while held upon said support, a plurality of resilient wires secured to the bar and extending between the knives and bearing down upon the cut threads, means for adjusting the position of said bar on said studs and means for shifting said bar longitudinally.

3. In a machine of the class described, a frame, spaced brackets secured thereon, vertical studs extending from said brackets, a bar connecting said brackets, said bar having a pair of slots through which said studs extend, springs surrounding said studs and supporting said bar, a support over which a fabric is moved, a plurality of knives for cutting pile threads on said fabric, and a plurality of flexible fingers on said bar extending between the knives and adapted to hold down out threads.

4. In a machine of the class described, a frame, spaced brackets secured thereto, a vertically extending stud on each of said brackets, a bar having a pair of slots through which said studs extend, a sprin placed between said bar and each of said brackets and surrounding the studs, means on said studs for adjusting the position of the bar thereon, a support for a moving fabric, a plurality of spaced cutters adapted to cut thread on one face of said fabric while the same is moved over said support, a plurality of spaced resilient wires secured to the bar and projecting therefrom and bear ing downward with resilient pressure on the fabric moved over the fabric support, and means for shifting the bar in its longitudinal direction to adjust the position of said wires relative to the cutters.

5. In a machine of the class described, the combination with a support for a moving fabric, a plurality of spaced cutters and means for causing the same to sever threads on the face of the fabric moved on the support, a member secured adjacent to the support, a lurality of spring fingers having their en s fixed to the member and their opposite free ends projecting between the cutters and resting upon the fabric on the support, means for shifting the member to and from the support and means for shifting the fingers relative to the cutters.

Signed at Williamstown, county of Berkshire and State of Massachusetts, this 27th day of March, 1923.

JOHN S. BOYD. 

